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12 Cards in this Set
- Front
- Back
Direct Sunlight |
sunlight that strikes Earth’s surface at close to a 90° angle. |
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Earth’s axis |
An imaginary line through the center of Earth that connects the North Poleto the South Pole. o Earth rotates about its axis once every 24 hours. o Earth’s axis is tilted at an angle of 23.5 degrees. |
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Equator |
an imaginary horizontal line around the middle of Earth. |
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Northern hemisphere |
the half of Earth north of the equator. |
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North Pole |
the northernmost point on Earth. |
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Indirect sunlight |
sunlight that strikes Earth’s surface at an acute angle (less than 90. |
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Season |
one of the major divisions of the year, usually based on regular weatherchanges. o In most places, the year is divided into four seasons: winter, spring, summer, andautumn (fall). Each season is three months long. o In tropical regions, average temperatures do not change much during the year. In these regions, it is common to refer to the “rainy season” and the “dry season.” |
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Solstice |
one of two days during the year on which the direct rays of the Sun reach thefarthest from the equator. |
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Southern hemisphere |
the half of Earth south of the equator. |
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South Pole |
the southernmost point on Earth. |
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Summer solstice |
the first day of summer.o The summer solstice is the longest day of the year. North and south of the o In the northern hemisphere the summer solstice occurs on or near June 21. o In the southern hemisphere the summer solstice occurs on or near December 21.tropics, it is also the day when the noon Sun is highest in the sky. |
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Winter solstice |
the first day of winter.o The winter solstice is the shortest day of the year. It is also the day when the o In the northern hemisphere the winter solstice occurs on or near December 21. o In the southern hemisphere the winter solstice occurs on or near June 21.noon Sun is lowest in the sky. |